mutex: set pshared attributes on rw semaphore

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/mutex.c b/mutex.c
index 6022cdd77ef64a67cb77ab13180f33198acea1f3..5a65e53a2dde6ac2be247b8d05716df715b6be06 100644 (file)
--- a/mutex.c
+++ b/mutex.c
@@ -180,6 +180,7 @@ void fio_rwlock_remove(struct fio_rwlock *lock)
 struct fio_rwlock *fio_rwlock_init(void)
 {
        struct fio_rwlock *lock;
 struct fio_rwlock *fio_rwlock_init(void)
 {
        struct fio_rwlock *lock;

+       pthread_rwlockattr_t attr;

        int ret;
 
        lock = (void *) mmap(NULL, sizeof(struct fio_rwlock),
        int ret;
 
        lock = (void *) mmap(NULL, sizeof(struct fio_rwlock),


@@ -193,13 +194,30 @@ struct fio_rwlock *fio_rwlock_init(void)
 
        lock->magic = FIO_RWLOCK_MAGIC;
 
 
        lock->magic = FIO_RWLOCK_MAGIC;
 

-       ret = pthread_rwlock_init(&lock->lock, NULL);
+       ret = pthread_rwlockattr_init(&attr);

        if (ret) {
                log_err("pthread_rwlock_init: %s\n", strerror(ret));
                goto err;
        }
        if (ret) {
                log_err("pthread_rwlock_init: %s\n", strerror(ret));
                goto err;
        }

+#ifdef FIO_HAVE_PSHARED_MUTEX
+       ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+       if (ret) {
+               log_err("pthread_rwlock_init: %s\n", strerror(ret));
+               goto destroy_attr;
+       }
+#endif
+
+       ret = pthread_rwlock_init(&lock->lock, &attr);
+       if (ret) {
+               log_err("pthread_rwlock_init: %s\n", strerror(ret));
+               goto destroy_attr;
+       }
+
+       pthread_rwlockattr_destroy(&attr);

 
        return lock;
 
        return lock;

+destroy_attr:
+       pthread_rwlockattr_destroy(&attr);

 err:
        if (lock)
                fio_rwlock_remove(lock);
 err:
        if (lock)
                fio_rwlock_remove(lock);